How To Frame A Floor With I Joists

Tji s engineered wood i joists are my preferred framing members for floor systems.

How to frame a floor with i joists.

Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor. But larger is not always better when builders are constructing a home or adding a room addition. Layout the joist spacing on the sill plates. They are ideal for long spans including continuous spans over intermediate supports.

Attach the rim joists. Cut drill and attach the sill plates. Includes planning equipment and material acquisition area preparation and protection setup and cleanup. Because i joists are straight and true it s easier for builders to avoid crowning and maintain a level framing surface.

Almost no twisting or warping very little dimensional shrinkage stiffness and strength. Tji s offer many benefits compared to traditional dimensional lumber joists including. Floor joists spaced on regular intervals span the areas between supports such as walls foundations girders and beams. Fasten them to both the sill plate and the rim joist by driving framing nails through the outer edge of the frame.

Build basement bearing walls where necessary. I joists are used extensively in residential floor and roof framing. Normal spacing is 16 inches on center from center to center though some floors may have joists on 12 inch or 24 inch centers. Use 2 3 nails for each joist and drive them at a slight downward angle to make sure boards don t budge.

Designing the framing system for engineered lumber is a little different from dimensional lumber. This size is no longer acceptable when framing a structure. Tji floor joist framing. The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example.

Square the sill plate layout on the foundation. Floor joists installed on second or third or higher levels double as ceiling joists for the level below. In buildings with basements the first level of floor joists serves the same purpose. Design information for tji 110 560 joists.

Engineered lumber continues to become more and more popular in today s construction industry. Subfloor framing labor basic basic labor to frame subfloor with favorable site conditions. Beams 4 spacing and 2 x8 joists spaced 16 on center. Cut and install the floor joists between the rim joists.

When measured cut and placed correctly the main floor joists should fit flush against the rim joists. Brief steps to framing a floor for your storage shed or house.